01 -
Preheat the oven to 350°F (175°C). Grease and flour three 8-inch round cake pans.
02 -
In a medium bowl, whisk together the flour, baking powder, and salt. Set aside.
03 -
In a large bowl, beat the butter and sugar until light and fluffy. Add eggs one at a time, beating well after each addition. Stir in vanilla and melted white chocolate.
04 -
Add the dry mixture alternately with the milk, beginning and ending with the flour mixture. Mix until just combined. Divide the batter evenly between the prepared pans.
05 -
Bake for 25–30 minutes, or until a toothpick inserted into the center comes out clean. Let cool in the pans for 10 minutes, then transfer to wire racks to cool completely.
06 -
Combine raspberries, sugar, and lemon juice in a saucepan. Cook over medium heat until the raspberries break down. Add the cornstarch slurry and stir until thickened. Let cool completely.
07 -
Beat the butter until creamy. Gradually add powdered sugar. Stir in melted white chocolate, vanilla, and milk until the desired consistency is reached.
08 -
If necessary, level the cakes. Place the first layer on a cake board. Spread a thin layer of frosting, then a layer of raspberry filling. Repeat with the second layer. Frost the outside and top of the cake.
09 -
Chill the cake slightly to set. Decorate with fresh raspberries, white chocolate curls, or piped swirls of frosting.